Patent GB-729500-A (GB)
Title: Improvements in or relating to signature stitching machines
IPC: B42B2/02
Filed: 1952-11-24
Abstract: 729,500. Signaturestitching machines. ROSBACK CO., F. P. Nov. 24, 1952 [Jan. 17, 1952], No. 29718/52. Class 100 (1). A signature-stitching machine wherein the collated signatures to be stitched and advanced along a support to the stitching mechanism, comprises a reciprocable feed member for thus advancing such signatures on the support, and means for automatically varying the travel of the reciprocatory feed member upon successive reciprocations thereof, so as to stagger the stitching of successive assemblies. Feeding signatures to stitching machines.-As shown in Fig. 1, the machine comprises a housing F which supports stitcher heads 1 above a saddle member 2. The machine is driven by a motor 7 which drives a mainshaft 5 on which is mounted a cam disc 13 which operates the stitcher heads 1 through a vertically reciprocable bar 12 and through links 17, 18, 19 operates a slide 16 running in grooves 15 between the walls 11 of the saddle member 2. Attached to the slide 16 is a bar 20 formed with a plurality of fingers 21 (two as shown), one of which pushes signatures from the stitching station to the delivery station and the other of which feeds the signatures to the stitching station. The fingers 21 move the signatures in one direction only, being adapted in the other direction to slide underneath the fed signatures. In order to facilitate the packing of stitched signatures, the stitching on successive assemblies may be staggered. To this end the link 19 is connected to the cam disc 13 by an adjustable crank-pin 35 (Figs. 5 and 7) eccentrically mounted on the end of a stub shaft 37. On the other end of the stub shaft 37 is mounted a gear 39 meshing with a pinion 40 mounted concentrically with the shaft 5. The pinion 40 is normally prevented from rotating relatively to the shaft 5, but. its angular position may be varied by an arm 41 which may be fixed in one of two positions to the frame. In one position the crankpin 35 occupies first a position nearest the shaft 5, and then a position further from shaft 5 on alternate cycles so that the stitching is staggered. In the other position the crank-pin 35 occupies an intermediate position on both cycles so that the stitching is not varied. Delivery mechanism.-Attached to the frame F is a vertical plate 25 (Fig. 2) which supports a shelf 26 slidably attached thereto and held in positiori by pins 27 carried in brackets 28 and adapted to enter holes 29 in plate 25. Adjustably supported on the shelf 26 by means of a spring 31 is a vertical plate 30. The signatures are delivered to the shelf 26 from the machine by a guide plate 32 formed with an upper extension 33 projecting inwardly beyond the end of the saddle member 2 and curved rearwardly so that the extension compresses the signatures as they are delivered. The bar 20 of the machine is provided with an extension 40 which supports the assemblies after they have been pushed beyond the stitching station. A fixed stripper finger 31 strips the assemblies from the extension 40 on the return movement thereof so that they fall down the guide. plate 32 on to the shelf 26. Specification 700,892 is referred to.